XPS9570 all of a sudden stopped charging through thunderbolt port.

Hi,

I have a Razer Core X external GPU enclosure connected to the Thunderbolt port (usb-c port) of my XPS 9570.

This combination always made it possible to deliver enough power through the usb-c port to operate and to charge the XPS 9570. I never had to connect my 130W Dell charging adapter (not even during gaming sessions or more demanding tasks).

It always worked, even though the XPS always recognized the Razer Core X as a 65W adapter (Razer stating in it specs it's a PD device capable of delivering 100W).

Until recently (few weeks ago) all of a sudden the laptop is no longer charging through the usb-c port when connected to the Razer Core X. I suspect something changed after software/firmware/BIOS upgrade.

Having all the latest drivers, firmware, OS updates, ... (which I installed over the last few weeks):

• BIOS 1.10.1
• Windows 10 Version 1903
• Thunderbolt Software package version 17.4.79.510
• Thunderbolt Application version: 17.4.79.16
• Thunderbolt Service version: 17.4.79.13
• Thunderbolt Controller driver version: 17.4.79.11
• NVM Firmware version: 40.00

The reason why I suspect something changed after a software upgrade, is because the BIOS still recognizes the Razer Core X eGPU as a 65W charging device (which it always did and it always was able to charge or deliver power like this), it just doesn't allow it to charge any longer since a few weeks. You can see this in the pictures below:

While the Core X is connected with USB-C, BIOS still recognizes 65W adapter. So it's still delivering power but the laptop no longer accept it for charging (which it normally always did):
https://drive.google.com/file/d/1A0zlpdtgiPQeSdlbmAfh-PVVh4_oN96A/view

With the Dell power adapter connected it of course recognizes it as 130W and starts to charge:
https://drive.google.com/file/d/1LLI4B_O7MoEZOIe65_3-mWnp1hVf9vv_/view

What has changed?

Thank you.